Grinding-machine.



PATE'NIED FEB. 12, 1907. E. A. PETERSON.

GRINDING MACHINE.

APPLIOATION FILED APRJG. 1906.

3 SHEBTSSHEET 1.

INVENTORFF fia /x/zwm f m M ATTORNEKY 7H: Norms PETER No. 843,964. PATENTED FEB. 12, 1907. E. A. PETERSON.

- GRINDING MAGHINE.

APPLICATION FILED APR.16,1906.

3 SHEETS-SHBBT 3.

WITNESSES: l/VI/ENTOR ATTORNEYS EMIL A. PETERSON, OF APPLETON, WISCONSIN.

GRINDING MACHINE.

Specification of Letters Patent.

Patented Feb. 12, 1907.

Application filed April 16, 1906. Serial No. 311,903.

To Ml whom it may concern:

Be it known that I, EMIL A. PETERSON, a citizen of the United States, residing at Appleton, county of Outagamie, and State of Visconsin, have invented new -and useful Improvements in Grinding-Machines, of which the following is a specification.

My invention relates to improvements in grinding-machines.

The object of my invention is to provide means whereby the knife may be accurately adjusted to and held with uniform pressure against the surface of the grinding-wheel, upon which it is reciprocated transversely during the grinding operation, the reciproeating movement being derived from the grinding-wheel shaft.

In the following description reference is had to the accompanying drawings, in which- Figure 1 is a perspective view of my invention. Fig. 2 is a side view of the same. Figs. 3 and 4 are detail views, respectively, of the adjustable table upon which the knifeholder reciprocates, Fig. 3 being an end view, and Fig. 4 a top view, thereof. Fig. 5 is an edge view of the table. Figs. 6 and 7 are end and top views, respectively, of the carrier which reciprocates on the table and from which the knife-holder is supported. Fig. 8 is a detail front view of the bracket in which the table-adjusting screw operates. Fig. 9 is a side view of the same, showing a portion of the adjusting-screw. Figs. 10 and 11 are detail side and front views of the knife holder.

Like parts are identified by the same refer ence characters throughout the several views.

1 is the grinding-wheel, mounted upon a shaft 2, which carries a worm-thread 3, from which motion is transmitted to a carrier 4 through the worm-wheel 5, shaft 6, eccentric 7, and connecting-rod 8, the latter being pivotally connected at 9 with the carrier 4. The carrier 4 is provided with raised bearingblocks 12 and 13, in which shafts 14 and 15 are journaled, and provided with intermeshing gears 16 and 17, preferably covered by a housing 18, as clearly shown in Fig. 1.

An arm 20, connected with the shaft 14, is provided with an adjustable weight 21, and an arm 22, fast on the shaft 15, is provided. with a knife-holder 23. The specific style of knife-holder illustrated is designed to receive what are known as barker-lnfives, used for stripping the bark from pulp Wood. These knives are illustrated at in Fig. 10. They are secured to the knife-holder by means of bolts 26, the heads of which are engaged in the undercut grooves 28. It will be understood, however, that knife-holders of various styles may be employed to suit the requirements of the knives to'be ground.

The carrier 4 reciprocates upon a table 35, which is preferably provided with a groove 36, in which a projection 37 on the carrier is adapted to fit, the groove and projection extending in the table and carrier longitudinally to the line of motion of the connectingrod 8. The table is adjustably mot nted upon the casing 40, the latter being provided with track-rails 41, having \l-shaped ribs 42 fitting corresponding grooves 43 (see Fig. 5) in the under surface of the table. The rails 41 extend outwardly at right angles to the channel 36 and parallel to the plane of the grinding-wheel 1, and the table 35 is moved along these tracks toward or away from the grinding-wheel. This adjustment of the table is secured by means of the adjrstingscrew 50, which is sw iveled at 51 in the casing and has screw-threaded bearing in a sleeve 52, carried-by a bracket 53, the latter having a cross-head 54, which is bolted to the table, as clearly ilhstrated in Fig. 1. The outer bearings 55 and 56 for the shaft 6 are carried by the table 35, and the shaft has sliding key connection with the wormw heel 5, being provided with a groove 57, in which a key carried by the Worm-wheel 5 may be slidingly engaged. When the table 35 is adjusted, the shaft 6 slides through the worm-wheel 5 and the inner bearing 58.

60 is a shield connected with the carrier 4 to protect the table 35 from grit.

61 and 62 are water-guards, which are preferably connected with the knifeholder.

In operation when it is desired to remove or replace a knife the lever 20 is lifted, whereupon shafts 14 and 15 are rocked in opposite directions. The shaft 15 is actuated through the intermeshing gears 16 and 17. The knife-holder 22 will therefore be moved out wardly from the stone when the lever is lifted, whereupon the knife may be adjusted thereto. The lever 20 is then depressed to swing the knife into contact with the grindingwheel 1, and the weight is then adjusted to regulate the pressure of the knife upon such wheel. The wheel being then set in motion, the knife will be reciprocated across the face of the wheel, thus not only grinding the knife with uniformity, but subjecting all portions of the grinding-surface of the wheel to equal wear.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a machine of the described class, the combination with a grinding-wheel; of an adjustable table, movable to and from the wheel; a carrier guided for tranverse movement to the table; a grinding-wheel shaft provided with a worm-thread; a transmission shaft having a worm-wheel splined thereon in mesh with the thread on the grindingwheel shaft; an eccentric-wheel 011 the transmission-shaft; a crank-rod connecting the eccentric-wheel with the carrier; and a knife-holder pivotally mounted on the carrier.

2. In a machine of the described class, the combination with a grinding-Wheel of a support; a set of shafts mounted thereon; gearing connecting said shafts; a knife-holder supported from one of the shafts; and a tension device connected with the other shaft and adapted to actuate the shafts to normally press the knife-holder in the direction of the grinding-wheel.

3. In a machine of the described class, the combination with a grindingwheel; of a sup port; a set of shafts mounted thereon; gearing connecting said shafts; a knife-holder supported from one of the shafts and a tension device connected with the other shaft and adapted to actuate the shafts to normally press the knife-holder in the direction of the grinding-Wheel; together with means for reciprocating said support transversely to the plane of the wheel.

I 4. In a machine of the described class the combination with a grinding-Wheel; of a carrier arranged to reciprocate laterally across the face of the grinding-wheel; a set of rockshafts mounted on the carrier and having gear connection with each other; a knifeholder connected with one of the shafts, and a lever connected With the other shaft and provided with an adjustable weight.

5. In a machine of the described class, the combination With a casing of a grindingwheel having a supporting-shaft journaled in the casing a table mounted upon ways on the casing and adjustable to and from the grinding-wheel; a rotary transmission-shaft mounted in a plurality of bearings on said table, and slidingly mounted in a casingbearing; a worm-Wheel slidingly mounted on the transmission-shaft; an eccentric fixed to the transmission-shaft between the table bearings and serving to hold said shaft against relative longitudinal movement; a carrier guided for lateral movement on the table; a connecting-rod operatively connecting the eccentric and carrier; and a knife-holder mounted on the carrier.

In testimony whereof I afIiX my signature in the presence of two witnesses.

EMIL A. PETERSON. WVitnesses:

WILLIAM H. BURNS, FRANK E. SLoAN. 

